Not arguing the point. If we can have multiple cap-badges in a Bde, why not in a Bn?
On the Reg F side: The rule of 9 is suspect logic, driven by the desire for a multiple of three regts, all being equal. My solution is to remove 2 R22eR, take the positions and spread them among the other 8 Bns. Then rebadge 2 RCR and 2 PPCLI to 1 and 3 RHC (The Black Watch). Then, while all that hub-bub is going on, create a few regional regiments in the Reserves, where the cap-badges stay, but at the Coy level.
And re: Cutting senior positions in the Reserves. If we could get a ratio of 1 LCol to every 100 trained soldiers in the Reserves I'd be ecstatic. (I'm talking parade strengths, not paper strengths). Right now, we're closer to half that ratio. So don't feed me bumph that we need all those senior spots for aspirational reasons - let's crank down a bit and push the cream to rise to the top, vice having the last man standing step into the chair. The number of units that routinely parade more than 200 soldiers (trained or untrained) can be counted on one hand.